Pinwheel



a new and improved form of a dou UNITED STATES PATENT OFFICE.

WILLIAM C. HEINDL, OF ROCHESTER, NEW YORK.

PINWHEEL.

Specification of Letters Patent. Patented Feb; 1 1921 Application. filed DecemberS, 1919. Serial No. 343,366.

To all whomit may concern: i i

Be it known that LWVILLIAM C. ,HEI-NDL, citizen of the United States, residlng at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Pinwheels, of which the following is a specification.

The object of this invention is to provide le pin wheel made of two sections in such a. manner that the blades of the sections are evenly.

the double pin wheel.

sections of the double pin wheel as they. appear when placed one on top of the other Fi 3 is a pla n viewof the front and rear with their outer edges linedup parallel to one another. A a r Fig. 4 is a plan view of the front and rear sections of the double pin wheel as theyappear when one is placed on top of the other and one of the sections has been shifted relation and interlock the sections.

Fig. 5 is an elevation of the double pin wheel formed by bending the right hand tip of each wing of'the two sections to the center.

In the drawings, like reference numerals indicate like parts.

In the drawings, reference numeral 1' in-j dicates a plan view of the front section reference numeral 2 indicates a plan view of the rear section of the pin wheel. Each of these sections is made of a square piece of stock which is sufliciently stiff yet flexible enough to keep its shape when bent to the desired form. From each quarter ofeach of these sections a slit is cut extending radially toward the center for a suitable distance. The slit at the inner end curves around in a uniform direction to terminal points located eccentrically 221? to one side of radial lines drawn from the corners of said sections, from which terminal points a comparatively short slit extends outwardly at an angle to the long slit. It is shown in Fig. 2 is a plan viewof the rear section of both sections because both sections will be made with the same die. In one of the sections this short slit will not function and it may be omitted from that section on that account. The sections are otherwise the same, the only difference in the front and rear sections being a difference in position.

The. rear section 1s reversed or inverted. in its position as compared with the position of the front section. This reversion of iosi tion causes the curved part of the slit to bend in the opposite direction. This is necessary to secure the r'oper engagement of the wings and interloc ing effect between the sections.

The wings of the front section are indicated byl the reference numerals 3, 4, 5 and 6 and t dicated by the reference numerals 7, 8, 9 and 10. r

For the purpose of forming a pin wheel,

the front section is laid on top of the rear e wings of the rear section are iny section and the left hand corner of each wing of the rear section is lifted and the front section is then rota-tedso that the right hand rear corner of each wing thereof will pass under the left hand corner of the wing ahead of item the lower section, as it is rotated, causing the right hand end of each wing of the front section to be nested between the adjacent ends of the adjacent wings of the rear section. The front section is rotated in this way about 45keening the center ofthe sections in line with each other. This will bring the; ends of the curved slots 8 in the one section into engagement with the ends of the curved slots in the other section, at which point the ofi'sets in the slots of one section can engage with the wings of the other section, causing the one section to be positively interlocked with the other section.

The right hand endof each wing canthen straight lines instead of a straight line and a curve, the bent or curved portion-in each case being in addition ,to the offset at the end.

thereof. In either case, when one of the sections is reversed and nested and interlocked with the other section, the slits in the two sections will stand about 455 apart.

1. In a double pin wheel, thecombination OffifPflll of polygonal sections,one superimposedfbnthe other, each of said sections being'slit at their corners with diagonal or radial slits to form a series of wing members out of each of saidsections, the diagonal slits having their inner ends curved outwardly and terminating in short slits forming extensions at an angle to said diagonal slits, the slots of one section being curved in the direction opposite to those of the other section and the wing members of one section nesting between "the wing members of the other section in such a manner that the wing members of one section project into the angular extensions of the slits of the other section, one corner of each wing member being bent to the center and fastened on the axis of the wheel.

2.. In a double pin wheel, the combination of a pair of polygonal sections, one superimposed on the other, each of said sections being slit at their corners with diagonal or radial slits to form a series of wing members out of each of said sections, the diagonal slits having their inner ends curved outwardly, the slits in onesection terminating each in short slits forming extensions at an angle to said diagonal sl1ts,'one section being placed on the. other section with its slits curred. in the opposite direction to the lower section, the wing members of one section nesting between the wing members of the other section in such a manner that the wing members of one section project into the angular extensions of the slits of the other section and are held in locked engagement thereby, one corner of each wing ment her being bent to the center and fastened on the'axis of the wheel.

3. In a double pin wheel, the combination of a pair of polygonal se tions, one superimposed on the other, each of said sections being slit at their corners with diagonal or radial slits to form a series of wing members out of each of said sections, means for holding one of said sections in locked ongagement'with the other section with the projecting tips of the two sections spaced substantially uniformly apart in a. circle. one corner of each wing member being bent to the center and fastened on the axis of the wheel.

' 4. In a double pin wheel, the combination of a pair of polygonal se'tions. one superimposed on the other, each of said sections being slit at their corners with diagonal or radial slits to form a series of wing members out of each of said sections. the diagonal slits having their inner ends curved ontwardly, one section being placed on the other section with its slits curved in the opposite direction to the lower section, the wing members of one section nestingbetween the wing members of the other section, one corner of each wing member being bent to the center and fastened on the axis of the wheel.

5. In a double pin wheel, the combination of a pair of polygonal sections, one superimposed on the other, each of said sections being slit at their corners with diagonal slits to form a series of wing members out of each of said sections, said diagonal slits terminating at points 225 to one side of radial lines drawn from the corners, one of said sections having short slits extending outwardly from said terminal points, the wing members of one section being adapted to nest between the wing members of the other section in such a manner that 1 he wing! members of one section proje't into the angn lar extension slits of the other section, one corner of each wing member being bent to the center and fastened on the axis of the wheel.

In testimony'whereof I afiix my signature.

WILLIAM C. HEINDL. 

